Photoemission study of the electronic structure of valence band convergent SnSe
Wang, CW; Xia, YYY; Tian, Z; Jiang, J; Li, BH; Cui, ST; Yang, HF; Liang, AJ; Zhan, XY; Hong, GH; Liu, S; Chen, C; Wang, MX; Yang, LX; Liu, Z; Mi, QX; Li, G; Xue, JM; Liu, ZK; Chen, YL
2017
发表期刊PHYSICAL REVIEW B
ISSN2469-9950
卷号96期号:16页码:-
文章类型期刊论文
摘要IV-VI semiconductor SnSe has been known as the material with record high thermoelectric performance. The multiple close-to-degenerate (or "convergent") valence bands in the electronic band structure has been one of the key factors contributing to the high power factor and thus figure of merit in the SnSe single crystal. To date, there have been primarily theoretical calculations of this particular electronic band structure. In this paper, however, using angle-resolved photoemission spectroscopy, we perform a systematic investigation of the electronic structure of SnSe. We directly observe three predicted hole bands with small energy differences between their band tops and relatively small in-plane effective masses, in good agreement with the ab initio calculations and critical for the enhancement of the Seebeck coefficient while keeping high electrical conductivity. Our results reveal the complete band structure of SnSe and help to provide a deeper understanding of the electronic origin of the excellent thermoelectric performances in SnSe.
关键词Performance Bulk Thermoelectrics Figure Merit Temperature Power Crystals
DOI10.1103/PhysRevB.96.165118
关键词[WOS]PERFORMANCE BULK THERMOELECTRICS ; FIGURE ; MERIT ; TEMPERATURE ; POWER ; CRYSTALS
收录类别SCI
语种英语
WOS记录号WOS:000412700200002
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28770
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Wang, CW,Xia, YYY,Tian, Z,et al. Photoemission study of the electronic structure of valence band convergent SnSe[J]. PHYSICAL REVIEW B,2017,96(16):-.
APA Wang, CW.,Xia, YYY.,Tian, Z.,Jiang, J.,Li, BH.,...&Chen, YL.(2017).Photoemission study of the electronic structure of valence band convergent SnSe.PHYSICAL REVIEW B,96(16),-.
MLA Wang, CW,et al."Photoemission study of the electronic structure of valence band convergent SnSe".PHYSICAL REVIEW B 96.16(2017):-.
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